News recommender systems – Survey and roads ahead     

Mozhgan Karimi  Dietmar Jannach  Michael Jugovac 《Information processing & management》2018,54(6):1203-1227

More and more people read the news online, e.g., by visiting the websites of their favorite newspapers or by navigating the sites of news aggregators. However, the abundance of news information that is published online every day through different channels can make it challenging for readers to locate the content they are interested in. The goal of News Recommender Systems (NRS) is to make reading suggestions to users in a personalized way. Due to their practical relevance, a variety of technical approaches to build such systems have been proposed over the last two decades. In this work, we review the state-of-the-art of designing and evaluating news recommender systems over the last ten years. One main goal of the work is to analyze which particular challenges of news recommendation (e.g., short item life times and recency aspects) have been well explored and which areas still require more work. Furthermore, in contrast to previous surveys, the paper specifically discusses methodological questions and today’s academic practice of evaluating and comparing different algorithmic news recommendation approaches based on accuracy measures.  相似文献   

对跆拳道运动员踝关节损伤的调查分析     

王晓 《四川体育科学》2003,(3):13-14

对上海体育学院24名跆拳道运动员踝关节的损伤情况进行调查与分析，找出原因，提出建议。结果显示：24名运动员都有踝关节受伤史，而受伤部位最多的是外踝副韧带，其次是内踝副韧带和胫腓韧带联合。受伤最主要的原因是因为队员在训练或出赛之前准备活动不充分。受伤的队员主要集中在一级和无级别队员上。对此，提出以下建议：队员在思想上要重视准备活动。训练中教练员要严格遵守训练原则，根据运动员的年龄、性别、训练水平、健康状况等合理安排运动量。加强小肌肉群的练习，尤其是踝关节韧带的力量等。  相似文献   

Gender and Leadership in Academic Libraries     

Emmett Lombard 《The Journal of Academic Librarianship》2018,44(2):226-230

This study considers academic library personnel perceptions of gender and leadership associated with three obstacles – family, “double binds”, social capital – identified by Alice Eagly and Linda Carli in 2007. A survey was created that provides prompts to measure perception of these obstacles as they apply to both genders. Ninety-two library personnel from a random sample completed the survey. Findings from a t-test that describe and interpret the results are presented, along with themes coded from survey comments. Suggestions Eagly and Carli offer to improve leadership equity are adapted specifically to academic libraries.  相似文献   

服务质量评价系统设计及实现     

阚德涛  张志武 《现代图书情报技术》2008,3(7):66-69

概括当前高校开展服务质量评价工作的现状,参照LibQUAL+TM实现模式,以本馆服务质量评价系统的开发实践为例,从设计思路、系统功能、技术实现等几个方面介绍实现服务质量评价的系统方法,为图书馆开展服务质量评价工作提供一定的参考依据。  相似文献   

Doping control in sport: An investigation of how elite athletes perceive and trust the functioning of the doping testing system in their sport     

《Sport Management Review》2016,19(1):6-22

Doping testing is a key component enforced by anti-doping authorities to detect and deter doping in sport. Policy is developed to protect athletes’ right to participate in doping-free sport; and testing is a key tool to secure this right. Accordingly, athletes’ responses to anti-doping efforts are important. This article explores how the International Standards for Testing, which face different interpretations and challenges when policy is implemented, are perceived by elite athletes. Particularly, this article aims to investigate how elite athletes perceive the functioning of the testing system (i.e., the efforts of stakeholders involved in testing) in their own sport both nationally and worldwide. Moreover, it seeks to identify whether specific factors such as previous experience of testing and perceived proximity of doping have an impact on athletes’ perceptions of the testing system. The study comprises a web-based questionnaire (N = 645; response rate 43%) and uses qualitative findings to elaborate on and explain quantitative results. Results showed that two-thirds of the athletes reported the national testing programme in their sport to be appropriate. A majority of the athletes who had an opinion on the subject regarded testing programmes in some countries as not extensive enough or believed that in certain countries doping control was downgraded to win medals. Past experience of testing seemed to have a positive influence on trust in the concrete measures; however, if athletes experienced flaws during the control procedures, this could increase distrust and cause worry. The proximity of doping in an athlete's sport influenced the athlete's perception of the testing system. Particularly, athletes who need the testing system to be effective and to function well across the world show greater distrust of or dissatisfaction with the current testing system. The athletes’ diverging views indicate that contemporary anti-doping policy is simultaneously met with support, (dis)trust and frustration. By integrating the views and experiences of Danish elite athletes, this study confirms that the current testing system is confronted with obstacles, and it contributes knowledge about some of the challenges WADA faces when policy is implemented. Implications of results and recommendations for anti-doping authorities are outlined in the paper.  相似文献   

福清市龙江流域水环境质量分析与对策     

林能文  杨峰 《福建师大福清分校学报》2007,(5):54-58

通过一年来的单月监测结果分析,评价了福清市龙江流域水环境质量状况及水污染治理效果.  相似文献   

Validation of the programmatic assessment survey for college students’ expectations and perceptions of the integrative studies curriculum     

《Studies in Educational Evaluation》2023

This study evaluates the validity and reliability of a programmatic assessment survey to measure students’ expectations and perceptions of general education curriculum, and considers the extent to which scales are related to non-cognitive variables. The results showed that the scales are valid from both theoretical and statistical perspectives and highly reliable. Hierarchical linear models were applied to understand whether students’ perceptions of the curriculum vary as a function of gender, ethnicity, major, and length of study in college. Students’ perceptions of the curriculum were discovered to be insignificantly different from each other, and students with higher expectations of the curriculum had significantly higher perceptions of it. This research provides a significant addition to studies surrounding liberal learning. Understanding students’ expectations and perceptions of the curriculum provides insight into their underlying value system, and assists educational practitioners to measure the overall efficacy of the curriculum in general education.  相似文献   

Patterns of adversity and pathways to health among White,Black, and Latinx youth     

《Child abuse & neglect》2018

Research has demonstrated the negative impact of Adverse Childhood Experiences (ACEs) on long-term trajectories of mental and physical health. Yet existing literature on this topic is limited in its understanding of outcomes among youth samples, optimal measurement items and methods, and differences in adverse experiences across race/ethnicity. The current study used a person-centered approach to measure ACEs and their impact on youth health outcomes across three different racial/ethnic groups from a large national database. Patterns of exposure to adverse experiences among Black, Latinx, and White youth (N = 30,668, ages 12–17) were determined empirically using latent class analysis (LCA). Significant differences in class membership by demographic indicators (age, household income, sex) and concurrent health outcomes were identified. Different models emerged for Black (2 classes), Latinx (3 classes), and White youth (3 classes). Older and lower-income youth were more likely to have experienced adversities, but there were no differences in adversity likelihood by sex. Additionally, racial/ethnic minority youth were at greater risk of experiencing higher levels of adversity, poverty, and poor health when compared to their White counterparts. Rather than occuring in meaningful clusters, adverse experiences among youth reflected a cumulative risk model such that classes were defined by the overall intensity of adverse experiences (i.e., low, moderate, high). Findings provide greater knowledge regarding the relationship between ACEs and health and future research directions to inform more targeted and culturally-appropriate screening, prevention, and intervention programs.  相似文献   

The Importance of Being Colorful and Able to Fly: Interpretation and implications of children's statements on selected insects and other invertebrates     

Gabriele B. Breuer  Peter Kauf  Reto Rupf 《International Journal of Science Education》2013,35(16):2664-2687

Children have served as research subjects in several surveys on attitudes to insects and invertebrates. Most of the studies have used quantitative scoring methods to draw conclusions. This paper takes a different approach as it analyzes children's free-text comments to gain an understanding of their viewpoints. A total of 246 children aged 9–13 completed a standard questionnaire regarding their attitudes toward 18 invertebrates indigenous to Switzerland. Fourteen insect species and four other invertebrates were individually presented in a color photograph without any further background information. The children were given the opportunity to provide comments on each animal to explain the attitude score they had awarded. Nearly 5,000 comments were coded and categorized into 7 positive and 9 negative categories. A significant correlation between fear and disgust was not detected. Based on a hierarchical cluster analysis, we concluded that flying in the air versus crawling on the ground was a major differentiator for attitude and underlying reasons, only being trumped by the fear of getting stung. The visualization of our findings in a cluster heat map provided further insights into shared statement categories by species. Our analysis establishes that fear and disgust are separate emotions with regard to insects and other invertebrates. Based on our findings, we believe that prejudice-based fear and culturally evolved revulsion can be overcome. We suggest promoting environmental education programs, especially if they allow for personal experience, provide information in emotion-activating formats, and include content that resolves existing misinformation and myths.  相似文献   

An initial analysis and reflection of the metrics used in the Teaching Excellence Framework in the UK     

J. W. Gillard 《Perspectives: Policy and Practice in Higher Education》2018,22(2):49-57

In this paper, we look at the results from the recent Teaching Excellence Framework (2017), which were made publicly available in June 2017. We offer some initial analysis and commentary, look at the primary reasons for providers being awarded Bronze, Silver and Gold, and look at some providers close to the borderline for their award. We demonstrate that the provider submissions, a narrative document prepared to accompany the submission would have had a significant effect upon the award bestowed.  相似文献